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path: root/drivers/irqchip/irq-bcm7120-l2.c
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Diffstat (limited to 'drivers/irqchip/irq-bcm7120-l2.c')
-rw-r--r--drivers/irqchip/irq-bcm7120-l2.c76
1 files changed, 53 insertions, 23 deletions
diff --git a/drivers/irqchip/irq-bcm7120-l2.c b/drivers/irqchip/irq-bcm7120-l2.c
index 3ba5cc7..d3f9769 100644
--- a/drivers/irqchip/irq-bcm7120-l2.c
+++ b/drivers/irqchip/irq-bcm7120-l2.c
@@ -26,10 +26,9 @@
#include <linux/irqdomain.h>
#include <linux/reboot.h>
#include <linux/bitops.h>
+#include <linux/irqchip.h>
#include <linux/irqchip/chained_irq.h>
-#include "irqchip.h"
-
/* Register offset in the L2 interrupt controller */
#define IRQEN 0x00
#define IRQSTAT 0x04
@@ -38,6 +37,11 @@
#define MAX_MAPPINGS (MAX_WORDS * 2)
#define IRQS_PER_WORD 32
+struct bcm7120_l1_intc_data {
+ struct bcm7120_l2_intc_data *b;
+ u32 irq_map_mask[MAX_WORDS];
+};
+
struct bcm7120_l2_intc_data {
unsigned int n_words;
void __iomem *map_base[MAX_MAPPINGS];
@@ -47,14 +51,15 @@ struct bcm7120_l2_intc_data {
struct irq_domain *domain;
bool can_wake;
u32 irq_fwd_mask[MAX_WORDS];
- u32 irq_map_mask[MAX_WORDS];
+ struct bcm7120_l1_intc_data *l1_data;
int num_parent_irqs;
const __be32 *map_mask_prop;
};
static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
{
- struct bcm7120_l2_intc_data *b = irq_desc_get_handler_data(desc);
+ struct bcm7120_l1_intc_data *data = irq_desc_get_handler_data(desc);
+ struct bcm7120_l2_intc_data *b = data->b;
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned int idx;
@@ -69,7 +74,8 @@ static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
irq_gc_lock(gc);
pending = irq_reg_readl(gc, b->stat_offset[idx]) &
- gc->mask_cache;
+ gc->mask_cache &
+ data->irq_map_mask[idx];
irq_gc_unlock(gc);
for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) {
@@ -81,11 +87,10 @@ static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
-static void bcm7120_l2_intc_suspend(struct irq_data *d)
+static void bcm7120_l2_intc_suspend(struct irq_chip_generic *gc)
{
- struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- struct irq_chip_type *ct = irq_data_get_chip_type(d);
struct bcm7120_l2_intc_data *b = gc->private;
+ struct irq_chip_type *ct = gc->chip_types;
irq_gc_lock(gc);
if (b->can_wake)
@@ -94,10 +99,9 @@ static void bcm7120_l2_intc_suspend(struct irq_data *d)
irq_gc_unlock(gc);
}
-static void bcm7120_l2_intc_resume(struct irq_data *d)
+static void bcm7120_l2_intc_resume(struct irq_chip_generic *gc)
{
- struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- struct irq_chip_type *ct = irq_data_get_chip_type(d);
+ struct irq_chip_type *ct = gc->chip_types;
/* Restore the saved mask */
irq_gc_lock(gc);
@@ -107,8 +111,9 @@ static void bcm7120_l2_intc_resume(struct irq_data *d)
static int bcm7120_l2_intc_init_one(struct device_node *dn,
struct bcm7120_l2_intc_data *data,
- int irq)
+ int irq, u32 *valid_mask)
{
+ struct bcm7120_l1_intc_data *l1_data = &data->l1_data[irq];
int parent_irq;
unsigned int idx;
@@ -120,20 +125,28 @@ static int bcm7120_l2_intc_init_one(struct device_node *dn,
/* For multiple parent IRQs with multiple words, this looks like:
* <irq0_w0 irq0_w1 irq1_w0 irq1_w1 ...>
+ *
+ * We need to associate a given parent interrupt with its corresponding
+ * map_mask in order to mask the status register with it because we
+ * have the same handler being called for multiple parent interrupts.
+ *
+ * This is typically something needed on BCM7xxx (STB chips).
*/
for (idx = 0; idx < data->n_words; idx++) {
if (data->map_mask_prop) {
- data->irq_map_mask[idx] |=
+ l1_data->irq_map_mask[idx] |=
be32_to_cpup(data->map_mask_prop +
irq * data->n_words + idx);
} else {
- data->irq_map_mask[idx] = 0xffffffff;
+ l1_data->irq_map_mask[idx] = 0xffffffff;
}
+ valid_mask[idx] |= l1_data->irq_map_mask[idx];
}
- irq_set_handler_data(parent_irq, data);
- irq_set_chained_handler(parent_irq, bcm7120_l2_intc_irq_handle);
+ l1_data->b = data;
+ irq_set_chained_handler_and_data(parent_irq,
+ bcm7120_l2_intc_irq_handle, l1_data);
return 0;
}
@@ -214,6 +227,7 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
struct irq_chip_type *ct;
int ret = 0;
unsigned int idx, irq, flags;
+ u32 valid_mask[MAX_WORDS] = { };
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
@@ -226,9 +240,16 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
goto out_unmap;
}
+ data->l1_data = kcalloc(data->num_parent_irqs, sizeof(*data->l1_data),
+ GFP_KERNEL);
+ if (!data->l1_data) {
+ ret = -ENOMEM;
+ goto out_free_l1_data;
+ }
+
ret = iomap_regs_fn(dn, data);
if (ret < 0)
- goto out_unmap;
+ goto out_free_l1_data;
for (idx = 0; idx < data->n_words; idx++) {
__raw_writel(data->irq_fwd_mask[idx],
@@ -237,16 +258,16 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
}
for (irq = 0; irq < data->num_parent_irqs; irq++) {
- ret = bcm7120_l2_intc_init_one(dn, data, irq);
+ ret = bcm7120_l2_intc_init_one(dn, data, irq, valid_mask);
if (ret)
- goto out_unmap;
+ goto out_free_l1_data;
}
data->domain = irq_domain_add_linear(dn, IRQS_PER_WORD * data->n_words,
&irq_generic_chip_ops, NULL);
if (!data->domain) {
ret = -ENOMEM;
- goto out_unmap;
+ goto out_free_l1_data;
}
/* MIPS chips strapped for BE will automagically configure the
@@ -270,7 +291,7 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
irq = idx * IRQS_PER_WORD;
gc = irq_get_domain_generic_chip(data->domain, irq);
- gc->unused = 0xffffffff & ~data->irq_map_mask[idx];
+ gc->unused = 0xffffffff & ~valid_mask[idx];
gc->private = data;
ct = gc->chip_types;
@@ -280,8 +301,15 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_ack = irq_gc_noop;
- ct->chip.irq_suspend = bcm7120_l2_intc_suspend;
- ct->chip.irq_resume = bcm7120_l2_intc_resume;
+ gc->suspend = bcm7120_l2_intc_suspend;
+ gc->resume = bcm7120_l2_intc_resume;
+
+ /*
+ * Initialize mask-cache, in case we need it for
+ * saving/restoring fwd mask even w/o any child interrupts
+ * installed
+ */
+ gc->mask_cache = irq_reg_readl(gc, ct->regs.mask);
if (data->can_wake) {
/* This IRQ chip can wake the system, set all
@@ -300,6 +328,8 @@ int __init bcm7120_l2_intc_probe(struct device_node *dn,
out_free_domain:
irq_domain_remove(data->domain);
+out_free_l1_data:
+ kfree(data->l1_data);
out_unmap:
for (idx = 0; idx < MAX_MAPPINGS; idx++) {
if (data->map_base[idx])
generated by cgit v0.10.2 at 2024-11-05 20:00:19 (GMT)